摘要
Preferentialflowistheordinaryphenomenonofrapidandnon-equilibriumtransportofwaterandsolutesoccurringinmostsoil.Itcauseslatentpollutionofgroundandsurfacewatersandaffectsrunoffyieldandflowconcentration.ThispaperstudiespreferentialflowforadarkconiferousecosystemintheupperreachareaoftheYangtzeRiver,establishesaclassificationforthepreferentialflowanddiscussestypesofpreferentialflowwithasoilcolumnexperimentusingahomemadeapparatusanddye-traceranalysis.Thepreferentialflowismainlyunsaturatedgravitationalflowintheupperlayeroftheslopedepositformatureforestsoil,whichisdominatedbyawetnessfront,andtheflowgraduallytransformstomacroporousflowasthesoillayerdeepens.Theobservedpreferentialflowintheyoung,middle-agedandover-matureforeststhathavegrownonglaciallateralmorainesismacroporousflow.ThepurposeofthisresearchistoanalyzesystemicallythebehaviorofsoilwatermovementforadarkconiferousforestecosystemintheupperreachareaoftheYangtzeRiverandtoprovideatheoreticalbasisforeffectivewatershedmanagement.
出版日期
2007年04月14日(中国期刊网平台首次上网日期,不代表论文的发表时间)